Car-brake



B. BOYER.

GAR BRAKE (No Model.)

No. 394,452. Patented Deo. 11, 1888.

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UNITED STATES PATENT OFFICE.

BASSLER BOYER, OF LEBANON, PENNSYLVANIA.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent N o. 394,452, datedDecember 11, 1888.

Application filed Cleptember 13, 1888. Serial No. 285,299. (No model.)

T 0 @ZZ whom it may concern.:

Be it known that I, BASSLER BOYER, a citizen of the United States ofAmerica, resid ing at Lebanon, in the county of Lebanon and State ofPennsylvania, have invented new and useful Improvements in Car-Brakes,of which the following `is a specification.

My invention has relation to car-brakes; and the objects are to providea car-brake of simple and durable construction, to increase the power,and to enhance the efficiency of the mechanism. This I accomplish bygrouping with the brake-bars carrying the brakeshoes and operativelevers rotary elliptical disks, as hereinafter specified.

I have clearly and fully illustrated my invention in the accompanying'tlra\vings,wl1ere 1n- Figure l is a bottom plan view of a carbody havingmy improved brake connected thereto and showing the relative positionsof the brakes on and off. Fig. 2 is a transverse sectional view takenthrough the line :c of Fig. 1, showing the brakes olf; and Fig. 3 is asimilar view taken through the line y y of Fig. l, showing the brakeson.

Reference being had to the drawings, A designates the bottom of the car,having the requisite bottom timbers, l, and a central cross-timber, 2,on the latter of which the operating-levers are shown pivotallyfnlcrumed.

B designates the trucks, the wheels of which are supported on axleshavingbearing-boxes, as usual.

C designates a cross-timber attached to the bottom of the car betweenthe wheels of the trucks, and constituting a timber to which linksconnected to the brake-bars are attached.

Immediately below the cross-timber C is arranged another cross-piece, D,a space being left between these two timbers for the purpose ofaffording room within which to dispose the disks.

E designates the brake-bars, suspended by links 3 from the cross-timberC. These brakef bars are provided with brake-shoes e of any of the usualapproved kinds. In the middle rear part of the brake-bars are attachedor formed thereon bearing-blocks 5, having their inner edge facesconcaved to conform to the sides ot' the elliptical disks, substantiallyas shown in the drawings.

F designates the elliptical disks, made of any suitable material havingstrength sufiicient to withstand the intended uses. These ellipticaldisks are mounted on vertical shafts U, having' suitable bearings in thetimbers, or have their lower ends fixed in hangers on the upper timber.The disks are made of such width in transverse section as that whenarranged with their longitmlinal center in the direction of thecross-timbers the brake-bars will swing inward and leave the brake-shoesfree -from the wheels, as shown in Fig. L of the drawings.

To restrain the too rapid turning of the disk in applying the brakes andto return the disks to a position of off-brakes when the power has beendisconnected or released, a spring, 7, is connected to the disk, theforce of which restrains its rotation and bears to throw the disk inreverse movement to that exerted by the power. As a spiral springarranged with torsional force or a straight springI may be with equalutility applied, Ihave shown both varieties applied, the first-namedbeing arranged above the disk and the latter below. Of course inpractice but one is used.

Power may be applied-to rotate the disks and apply the brakes either bythe handbrake staff or by the steam or air brake appliances, or both inconjunction. 'lhe handbrake leverage is designated by a rod, 8,connected to one end of the disk, the other end of said rod beingconnected to a lever, 9, mounted on a bearing and having the upper endconnected to the rod l0, which is connected to the one end of a lever,ll, mounted on the bottom of the car. At the other end of the lever llis connected the brake-rod 12, having connection with the brake-staff onthe platform of the car. I have not shown this last connection, as it isso well known as to not require special description or illustration. Thepiston I3 of the steam or air brake apparatus 14 is connected to thelever ll, to which is connected one end of a rod, 15, havingI its otherend connected to the disk substantially shown in Fig. l of the drawings,the lever connections and movements in this relation being shown indotted IOO lines. The interposition of the vertically-arranged lever 9is intended to provide connections to the disks, which Will turn them ona horizontal plane and avoid torsional strains; but in a connectioninvolving a direct attachment to the disks these levers may be dispensedwith.

Having thus described the mechanism involved, I now proceed toparticularly point out and distinctly claim the parts, improvements, andcombinations which I claim as my invention, as follows: y

l. The combination of the pivotally -supported rotary elliptical disks,the suspended brake-bars, and a lever or rod to rotate the disk on itsaxis, whereby the brake-bars are spread apart and the brakes applied,substantially as described.

2. The combination of the pivotally-sup- 2o ported rotary ellipticaldisk, the suspended brake-bars formed with concave bearingblocks to beengaged by the disk, and a lever or rod to rotate the disk and spreadthe brakebars, substantially as described.

3. The combination of the pivotally-mounted elliptical disk, thebrake-bars formed with concave bearing-blocks to be engaged by the disk,a lever or rod to turn the disk to spread the brake-bars, and a springon. the disk to restrain the too rapid turning of the disk in applyingthe brakes, and to return it to a normal position When the strain of thelever is thrown off, substantially as described.

In Witn ess Whereof'l have hereunto set my hand in the presence of twoattesting Witnesses.

BASSLER BOYER.

Attest:

PETER HALTER, S. G. HoRs'r.

